Attaching means for separable fastener installations

ABSTRACT

575,622. Fastenings. UNITED-CARR FASTENER CORPORATION. Nov. 3, 1943, No. 18236. Convention date, Oct. 23, 1942. [Class 44] A fastener member, particularly but not necessarily of rotary stud and socket type, is provided with a case having spaced bearing portions and is attached to a plywood or other non-metallic support by attachment members, each of which has integral prongs extending through the support and clinched therein, means being provided passing through the attachment member, or the bearing portion, of through both, to secure them rigidly together. The invention is described as applied to securing the socket member of a rotary stud cowling and like fastener to a non-metallic support 15 to which a cowling or like panel 14 is to be detachably secured, the socket shown being of the kind described in Specification 557,676, and engaged by radial arms 12 of the stud 10 rotatably mounted on the panel. The base of the socket has spaced extensions or bearing portions 19, shown in Fig. 1 as bearing against the inner face of the support. Each attachment member comprises a disc-like plate 26 secured to the bearing portion by rivet 25a and having integral prongs 28 which are forced through the support and clinched over as by an anvil plate pressed against the outer face of the support as the prongs are being forced home. In modifications the attachment member has an integral tubular rivet portion adapted to be passed through an aperture in the bearing portion and riveted over, one arrangement having the attachment plate overlying the bearing portion as in Fig. 1, the tubular rivet being downwardly directed, and in another arrangement having the attachment plate below the bearing portion, which rests thereon instead of directly on the support, the riveted portion being upwardly directed.

. Aug. 17, 1943. T. NEWBOLD 2,327,330

ATTACHING MEANS FOR SEPARABLE FASTENER INSTALLATIQNS I Filed Oct. 23, 1942 Patented Aug. 17, 1943 ATTACHING MEANS FOR SEPARABLE FASTENEB INSTALLATIONS Thomas Newbold; Santa Clara, N. Y., assignor to United-Carr Fastener Corporation, Cambridge, Mass., a corporation of Massachusetts Application October 23, 1942, Serial No. 463,026

8 Claims. (Cl. 24-221) The present invention relates particularly, though not exclusively, to rotary stud fastener installations of the type employing a rotary stud member formed with a lateral projection, as for example a radial pin, and mounted in a part to be secured to a support which stud memher is designed upon partial rotation, to interlock with a socket member attached to the support.

Fasteners of the above described type are extensively used in the airplane industry to secure airplane cowling, and like sheets to their supports. In the manufacture of certain types of planes the sheets or parts to be secured to the support are of non-metallic material such as fiber board or plywood and are substantially soiter than metal sheets. Dificult'y has been experienced in securely attaching the fastener parts to such softer non-metallic parts, as the usual rivets and like iastenings used in connection with metallic parts tend to pull through the softer material of the non-metallic parts.

The operative parts of the fastener are subjected to an unusually high degree of work when in use and such fasteners for airplane use are required to withstand a test of approximately 40,000 turns without rupture before being acceptable. In order to adequately withstand such a test, one or both of the fastener parts is advantageously heat-treated.

The present invention aims to improve the means for mounting and attaching the socket member of the fastening to the now-metallic support.

Illustrative of the invention reference is made to the accompanying drawing, in which Fig. l is a vertical sectional view of a rotary stud fastener installation according to the invention;

Fig. 2 is a plan view thereof as viewed from the outer face of the socket-carrying part;

Fig. 3 is a transverse sectional view as taken on the line 3-3 of Fig. 2 but showing the rivet as being integral with the attaching device;

Fig. i is a detail perspective View of one of the socket member attaching means shown in Fig. 1;

Fig. 5 is a sectional view, similar to Fig. 3, illustrating a modified form of the invention; and

Fig. 6 is a detail perspective view of the socket member attaching means illustrated in Fig. 5.

Referring to the drawing, the fastener installation to which my invention relatespreierably is of the type comprising a rotary stud member l0, formed with a head II and radial arms l2, and rotatably mounted in any suitable manner in an aperture l3 of a part It adapted to be secured to a support IS. The support I5 conveniently is apertured as at l6 for the. passage of the stud I0 and arms l2 and has mounted thereon a socket member l1 adapted for locking engagement with the armslZ of the stud on turning movements of the latter.

The socket member l'l may be of any of the approved types, the one shown herein being selected merely for the purpose of illustration. Conveniently it comprises a base It providing spaced bearing portions l9 adapted to bear upon the support it, said base being formed with an outwardly dished portion apertured as at to permit the passage of the stud ll] and radial arms l2 and providing a cam seat 2| for interlocking engagement with the arms I! of the stud.

Portion 22 integrally connected with the base [8 on opposite sides of the aperture may be bent upwardly and inwardly to provide locking means 23 adapted to overlie the radial arms 12 of the stud in its rotated locked position as will be understood by those skilled in the art. The particular form of socket member illustrated herein is not an essential feature of the invention and reference is made to the co-pending application'of William A. Bedford, Jr., Serial N0.-420,554, filed November 26, 1941, for a more complete description thereof.

The support l5 carrying the socket member I! is of non-metallic material, such as plywood, fiber board and the like, and the invention provides improved means for attaching said socket part to a sheet of such material.

According to the form of invention illustrated in Figs. 1, 2 and 3, the bearing portions IQ of the base of the socket member are formed with an aperture 25 through which may pass a rivet 25 for securing the attaching member to the socket member.

The attaching member is advantageously formed with a plate portion 26 apertured as at 2! to receive said rivet'ZE and bearing upon the bearing portions I9. The outer peripheral edge of the attaching plate is formed with a series of integral prongs 28 extending at right angles thereto. These prongs are formed with pointed outwardly curved free ends 29 which are capable of being forced straight through the material of the support It by pressure applied to the outer face of the plate.

In applying the pressure on the attaching plate 26 to force the prongs 28 through the support l5,-

and lie wholly embedded in the relatively soft material of the support l5. This provides a secure and effective mounting for the socket memher and attaching plate which will not pull out 1 3. In combination with a non-metallic support, a heat-treated fastener socket member adapted V to be attached to one face thereof and including of the relatively soft material even=when subjected to unduly heavy stress.

It will be understood that the tubular rivet 25*- is fiattenedover the outer face of the attaching plate in any suitable manner to fixedly connect the attaching plate to the bearing portions of the socket member.

According to a modified form of the invention,

as is illustrated in Figs. 5 and 6, the attaching plate 26 may underlie and support the bearing portions I9 of the socket I'l, thus providing a rigid bearing surface for the socket bearing portion and to a great extent avoiding the difficulty of having the socket member materially embedded in the material of the part l5. According to this form, and the form shown in Fig. 3, the attaching plate may be provided with the integral tubular rivet which extends through an aperclaims.

I claim: 1. In combination with a non-metallic support,

a separable fastener member adapted to be attached to one face thereof and including a base having spaced bearing portions and an attaching cap having integral fastening means adapted to. be connected to each of said bearing portions for Securing said socket member to said support, said fastening means extending through said support.

2. In combination with a non-metallic support, a separable fastener member adapted to be attached to one face thereof andincluding a base having spaced bearing portions and an attaching cap having integral peripheral prongs, a rivet connection between said cap and bearing portions, said prongs extending through said support and clenched therein.

a base having spaced bearing portions, and an attaching cap haviing integral peripheral bendable prongs, a rivet connection between said cap and bearing portions, said prongs extending through said support and clenched therein.

4. In combination with a plywood support, a two-part fastener member for attachment to said support and comprising a base portion and an attaching -portion, one of said parts being formed with an integral rivet engaging in an aperture of the other part, and said attaching portion having a plurality of prongs, said prongs extending through said support and clenched therein.

5. In combination with a plywood sup rt, a two-part fastener socket member for attachment to said support and comprising a heat-treated base portion and an attaching portion, oneof said parts being formed with an integral rivet engaging in an aperture of the other part, and said attaching portion having a plurality of bendable peripheral prongs, said prongs extending through said support and clenched therein.

6. In combination with a plywood support, a two-part fastener socket member for attachment to said support and comprising a base portion and an attaching portion, said base portion being formed with an integral rivet engaging in an aperture in said attaching portion, and said attaching portion having a plurality of peripheral prongs, said prongs extending through said support and clenched therein.

7. In combination with a plywood support, a two-part fastener socket member for attachment to said support and comprising a base portion and an attaching portion, said attaching portion having an integral rivet engaging in an aperture in said base portion, and said attaching portion having a plurality of peripheral prongs, said prongs extending through said support and clenched therein.

8. In combination with a plywood support, a two-part fastener socket member for attachment to said support and comprising a base portion and an attaching portion underlying and supporting said base portion, and said attaching portion having a plurality of peripheral prongs, said prongs extending through said support and clenched therein.

THOMAS NEWBOLD. 

